UNIVERSE LL W/SAPLINGPLUS MULTI SEMESTER
11th Edition
ISBN: 9781319278670
Author: Freedman
Publisher: MAC HIGHER
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Chapter 24, Problem 6CC
To determine
The distance traveled by a blob and the time taken by it, when this bright blob appears to move faster than the
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Suppose a hypothetical universe is expanding (at some moment in time) at a rate of H. At this same moment the density of this Universe is ρ.
(a) Confirm for yourself that this is a closed universe, given the values below.
(b) Determine, and enter below, the spatial radius of curvature for this closed universe (at the same moment in time at which the values above are given).
Values:
H = 56 km s-1 Mpc-1
ρ = 4.9x10-25 kg m-3
Give your answer for (b) in units of Mpc, to the nearest integer (not in scientific notation - e.g., 1234).
Explain, which factors will be resulted the shape of Brillouin zone (BZ) in k-space.
What are cosmic rays primarily composed of?
Chapter 24 Solutions
UNIVERSE LL W/SAPLINGPLUS MULTI SEMESTER
Ch. 24 - Prob. 1CCCh. 24 - Prob. 2CCCh. 24 - Prob. 3CCCh. 24 - Prob. 4CCCh. 24 - Prob. 5CCCh. 24 - Prob. 6CCCh. 24 - Prob. 7CCCh. 24 - Prob. 8CCCh. 24 - Prob. 9CCCh. 24 - Prob. 1CLC
Ch. 24 - Prob. 1QCh. 24 - Prob. 2QCh. 24 - Prob. 3QCh. 24 - Prob. 4QCh. 24 - Prob. 5QCh. 24 - Prob. 6QCh. 24 - Prob. 7QCh. 24 - Prob. 8QCh. 24 - Prob. 9QCh. 24 - Prob. 10QCh. 24 - Prob. 11QCh. 24 - Prob. 12QCh. 24 - Prob. 13QCh. 24 - Prob. 14QCh. 24 - Prob. 15QCh. 24 - Prob. 16QCh. 24 - Prob. 17QCh. 24 - Prob. 18QCh. 24 - Prob. 19QCh. 24 - Prob. 20QCh. 24 - Prob. 21QCh. 24 - Prob. 22QCh. 24 - Prob. 23QCh. 24 - Prob. 24QCh. 24 - Prob. 25QCh. 24 - Prob. 26QCh. 24 - Prob. 27QCh. 24 - Prob. 28QCh. 24 - Prob. 29QCh. 24 - Prob. 30QCh. 24 - Prob. 31QCh. 24 - Prob. 32QCh. 24 - Prob. 34Q
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- Explain why astronomers use the term “blueshifted” for objects moving toward us and “redshifted” for objects moving away from us.arrow_forwardFind the wavelength of maximum intensity of the cosmic microwave background radiation observed today. What band of the electromagnetic spectrum is that in? (Hints: Use Wiens law, Eq. 7-2, and examine Figure 6-3.)arrow_forwardStars form in the Milky Way at a rate of about 1 solar mass per year. At this rate, how long would it take for all the interstellar gas in the Milky Way to be turned into stars if there were no fresh gas coming in from outside? How does this compare to the estimated age of the universe, 14 billion years? What do you conclude from this?arrow_forward
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